Plug-cock.



s55' through the' body.

Ilnyention is tofproyide ai? o'o which whenelosed canv thoutf the insertion of 'the f ehwhen open can be easy-f"- jsdiand securely loeked"`by d I thdrawing the key..` idesin a cook having van ghtly-fpaeked plug and' a sof. arranged and. eoml bo Tthat theplu isrele'ased by` lthe'insertion-of"'theproper ey and is -.open'ed by turning the4 key, 'Whichcannotbe 4l'enmveduntilyturr'ied to locking "ositioin' 'of the key alwayslzcllb'ses the f= lof the aeeornpanyirlgv drawings shows'aside eleyaton'of thekfeoek and a keyfor manpulatingthe look and .turning the plug.- .F1g. 2 shoiisa plan of the oook. Fig.' gs'hows a side elevation with the body-eut in 'vertical longit1 1di nal-s 'eetion.n Fig. 4 shows a side elevationwith a part'ofl the body, thepaekings, and the packing-nuts out in trans-4 'Verse section. Fig; 5 shows aplan 4and an Velevation' of thegplug, and Fig'. 6 shows a-plan and section of oneof the packing-nuts.

'Thebody 1 ofthe oookv maybe cast to the desired shape 'ofl any metalI preferably brass or bronze. The tapering plug '2 is ground so'4 l as to tightly tit the tapering wall ofthe plugchamber in thebody and has a port 3, which ad pted to register with the iluidspassage Thelhub, Jiofr thev body is-extended upopen,v and the key cannot be twithdrawn u n.-

965'. sanering 'zsmeea y wardly', and y'the aboutl'the stem ..5

theglufg'7 isa aoking 6,whiehisforeedagainst the argeen l of theplugbya-nut 7 ,that has an exterior thread which-'fits an ,interiori 6o threadfirithe hub.' 'Thisnutwhenturned down forces thisA packing closely against the'f' y large end of the'- `plug and' holds ftheif` plug down in the tapering' chamber and also* preel Ijyents the-leakage of any -luid 4up''around'the 265 stern of the plug. Aboyefthis nut is afpaek- {in-g l8, the'exterior ofwhiohyfitsthe thi'eadsin the wall of thehub, and ahorre this paeking is' a nut9, whiehfwhen screwed down in thelnib;

"ex andsl this vpacking 4sothat -lid'r cannot"--7o -lea betweenlthe` threads and the packing-.1: Inthe upper art ofthe hubis a cylinder l10, containing t reusu'al spring-tiunbler-pinsj= llywhioh hold the"'1`eylinder against rotationf-L until the'lprop'er-key is insertedin the slot12;75

The cylinder -i' secured in plaee 'by turning;V

the ripper edge of the hub'over a washer 1.3,: that' 1s' set in the end.; 'i- Two lugs :1-1; extend downwardly fronithe lowerl art of the look cylinder either side 'of the re uced upper end'So Whenthe proper key'is' inserted in the 'slot f drawn-faiterfthe'nianrer eon'nnon `to eyli1v1der'l f looks1 allowing'thecylinder:to' be turned by. 85

the key- ""llfhen the'eylinder isfturiied,. -the-=" lugs which proj ectbelowfengagge'- the 4'stein of the plug kand turnfythe plug,-so as tof'o'pen-forfj` elo'se the passage lthrough the oook;

In the washer ythat is fastened'nthe upper 9o' l` I end ofV thefhnb `and that retains'the cylinder j infplaee is a 'curvedsl'otf 15, and extending upwardly into this slot from the end of the kcylinder 'is a stud 16.- This studV engages the y ends of the slot for determining the amount .9 5 of movement of the Cylinder and the lug.' The oylinder-loek shown is one of Vt lose in which when the proper key' is insertedA the' eylinderisunlooked and 4can be freely turned by the key ;A but the key cannot be removed until theeylinder is turned back to the looking osition, when Vthe \\*ithdiawal of the key al ows the pins tolookthe cylinder'against'movenient. .The eylinderancl the plug are so'oon-I neeted that when the key is in looking'posi# 195 tion and can. be withdrawn f the plug -is so .l turned as to close the passage through thev oook. By this means the keyis always held,y in i I position .ready to closet-he cook i-the cock is 'V allowing the plug to be sufiicientlyloose to turn freely. One packing prevents any leakage of Huid around the stem of the plug, and',

the other prevents` any leakage past the threads around the inner Wall of the hub, The two nut-s Which keep the packings tight and assist in holding the plug in position also act as lock-nuts to prevent either nut from turning loose when the plug is turned.

A cock constructed in this manner can be easily opened and closed by the proper key and yet will always be tight, so that the cock may be used for controlling the tlow of such volatile fluids as gasolene, naphtha, and. the like. There are no screws, pins, or other means which are easily removable for holding the plug and lock-cylinder in the body,

and the bottom of the body is solid, so that a Wrench or screw-driver cannot be applied for turning the plug.

The invention claimed is- 1. A plug-cock having a body with a solid integral wall containing a tapering plugchamber having an' imperforate ybot-tom and a cylindricallook-chamber, a tapering plug rotatable in the plug-chamber, a' cylinderlock 'fitting the lock-chamber, means connecting the lock-Cylinder and the plug, a Washer lock fitting the lock-chamber, means connec-ting 'the lock-cylinder and the plug, a

slotted washer secured in the outer end of the lock-chamber, a pin extending from the end of the lock-cylinder into the slot i'or determining the movement of the cylinder, and a key for manipulating the lock and turning' the cylinder and plug, substantially as speci'- lfied.

3. A plug-cock having a body with a solid integral Wall containing a tapering plug-- chamber having an imperforate bottom and a cylindrical lock-chamber, ataperinv plug rotatable in the plug-chainber, a cy inderlock secured in the lock-chamber, means connecting the lock-cylimlor and the plug, means above the plug for holding the plug down,

tightly in the plug-chamber, and a key for inanipulating the lock and turning the cylinder and plug, substantiallyas speciiied.

4. A plug-cock having a body with a tapering plug-'chamber and a cylindrical lockchamber, a tapering plug rotatable in tbe plug-chamber, a cylimler-loek secured in the lock-chamber, means connecting the lockeylinder and the plug, a packing bearing on the large end of the plug, a nut turning in the body against the outer face of the packing for holding the packing and plug in place and preventing leakage from the plug-cluunber, and a key for manipulating the lock and turning the cylinder and plug, substantiall)v as specified.

. A plug-cock having a tapering plugchamber and a eylindrieal-lock-chamlier consecured in the outer end ot the lock-chamber tained 1n an integral body with an imperioand holding the cylinder in place, and a key t for manipulating the lock andi-inning the rate bottom, a tapering plug rotatable in the plug-chambery a cylin lerlock secured in the loek-cl'iamber, and connected with tbe plug, a yielding washer bearing against the large end of the plug and packing the :stem of the plug` a nut screwed into .the chamber for holding` the stem-packing, a yielding Washer above this nut and packing the outer wall ot the chamber, a nut. screwed into the charnber for holding the all-packing, and a key for manipulating the lock and turning the cylinder and plug, substantially as specilied.

` EBEXEZER lllLL, Jn. vitnessesz Joux ll. SLATER, E. ll'rLL. 

